Internal-combustion engine.



A. VOGT.

INTERNAL GOMBUSTION ENGINE.

APPLIUATION FILED 00T.1, 1907. l

Patented July 8, 1913.

Inventor. QM @if Witnesses.

UNITED STATES PATENT OFFICE.

A. DOLF VOGI, 0F TULSE HILJ, COUNTY OF S'URBEY, ENGLAND.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Original application filed May 18, '18.06, 'Serial No. 317,591..'.llividedi'and this application Y 1907. Serial 170,395,451.

Patented July 8, 1913.

led October 1,

To all 'whom z'tmag/ concern:

Be it known that I, AnoLF Voer, a citizen' of Austria-Hungary, residingat 149 Tulse Hill, in the county of Surrey, England, civil engineer,have invented certain new and useful 'Improvements inInternal-Combustion'Engines, of which the following is a specification.

My invention which is a division of my;

pending application dated 18th May, 1906, Serial No. 317,591, relates tointernal combustion engines working with uniform pressure, which-do notcompress their air for combustion in the engine cylinder and intothe'cylinder of which compressed air andl liquid fuel aresimultaneouslyintroduced, from the dead-point onward during a portion ofthe working stroke, in which case, ofcourse, the external pressure onthe air and fuel supplied tothe cylinder must always be slightly abovethe combustion pressure inside the working cylinder.

The object of this' invention is to regulate:

the supply of liquid-combustible during the combustion period of theworking-stroke in,

such'a manner that this supply is proportionate to the motion of thepiston at dill'er ent speeds and different periods of admission, andalsothat the supply of combustible shall always be vproportionate to thequantity of air admitted. For this purpose the liquid combustible issupplied by a meas nung-pump, the duration of the supply ofliquid'combustible at the admission .period of they power stroke beingcontrolled -by a suitably operated combustible supply valve closingtogether with the air valve, and any excess A`of supplied combustiblebeing allowed to return to the reservoirafterjthe closingof the lsaid,valve by means of a suitably loadedoveriow valve. l

The drawing shows b way of eXamplea section through the wor ing cylinderof Van engine yembodying thei'features -of my in#- vention.v

The general arrangement of the engine.

ed in one end of a two-armed lever d pivoted at c and whose opposite endis connected by the adjustable rod f to the curved valve lever 7performing in a well-known manner a combined rolling and rockingmovement on plate g, whereby a great leverage is obtained on first'vopening the valve. The lever 7 is pivotally connected to the stem of theinlet valve 1 and projects beyond this connection in beak S. The cam bis secured to or forms part of an eccentrici secured to the shaft a. Thestrap around eccentric i has a projecting arm Ic connected by a link Zto alever 2 on the controlling shaft 6 to which is connected lever 5connected to the rod m raised and lowered by the lgovernor, not shown.When the lever 2 is on the dotted line 3 the cylinder receives nocharge, -Whlle in the position 4 over 50 per cent. filling can 'beadmitted. The governor acts upon the lever.5 which shifts the shaft 6and consequently the lever 2 and the eccentric strap connectedtherewith. The springclosed valve 11 for supplying liquid combustible isopened by the beak S of the lever 7 acting upon the adjusting screw 9 ofthe lever 10. The lever 7 is operated by the cam surface-of theeccentric on the valve motion shaft.

The pump 12 for the supply of liquid combustible is operated from theengine iston or piston rod by a lever, as shown, ut may be also operatedeither from the valve` gear or the engine shaft. This measuring pump 12has a differential )lunger 18, the extension 14 of which may e used tooperate an indicator apparatus for the engine should one be employed,but such4 an arrangement forms no partof this inventionand furtherdescription thereof is unnecessary. The motion of the plunger 13 andconsequently the supply of liquid fuel to vthe cylinder is renderedproport1onate to the 'motion of the engine piston, by which meanthecombustion of the charge is made to take place at a uniform pressure`the proportions of the air supply and that of the liquid combustiblebeing maintained practically constant, whereby a combustion as freefromi smoke as posslble is obtained.

` 15 is a reservoir for liquid combustible vwhich is supplied throughpipe 33 communicatinewith a pump, not shown, but which may Worked forinstance from the engine shaft, which is arranged to supply morecombustible than is normally required. Any excess of combustible iscaused by a iio-at valve 152L to iiow back through a pipe 16 into themain reservoir for liquid combustible. The measuring pump 12 has twospring# loaded valves 17 and 18. The combustible passes through pipe 19into the space 20. The reservoir 15' is subject by pipe 21communicating'with .a suitable source of com` pressed air supply, notshown to the pres'- sure of the air supply. The space 20 will thereforealways be filled with liquid com` bustible under pressure. When, aftervalve 11 has closed, the plunger 13 continues its upward motion, theliquid in the space 20 is forced through pipe 23 back into the vessel15, the valve 18, which is-loaded by a strong spring 22 being forcedopen by the liquid fuel displaced by the plunger 13. The valve 1Sthusserves as an overflow or by-pass valve.

The space 20 is connected by a pipe 24 to the supply valve 11 from whicha channel 25 leads to the annular space 26 surrounding the valve casing27.- From the space 26Y small perforations 29 in the valve Casinleadtothe admission valve 1. Y

30 and 31 are shut-,off cocks, 32 is a dis-A charge c'ock, 33 is a fuelfeed supply pipe leading from the main pump to the vessel 15. vThedifferential piston 13 of the' pump is so dimensioned asta supply therequired quantityof combustible. Y

he operation is as follows: The ignition of the charge is normallyleffected by'fthe compressed residues of the previous charge.

yThe burnt gases are compressed up to 20-30 are mixed as they 'enter thecylinder, while the exhaust valve, not'shown, is closed -before the endof the expelling stroke. The exhaust valve which controls the exhaustfpipe 35 surrounding the compressed air supf ply pipe 34 may -beconveniently positioned in the head of the cylinder. v .The first igniition may be e'ected by any knowni niting= device in the cylinder or inthe exha t con- -duit or byincreasing all the pressure on starting theengine to such a degree that the A, ignition is eiectedby thecompression of air admitted into the cylinder by a separate valve. Afterthe ignition hasloeen eecte'd the ignition device may beputout ofaction? The admission valve l .and theA valve 11 are opened bythecontrolling -mecli'anismjjust in advance of the: end ofthe upwardstroke of the pistonin order that the air and liquid l claim:

combustible may enter the cylinder as soon as the engine piston reachesthat position.

As the engine piston moves downward on its power stroke the pump plunger13 moves ,at the same time upward. and forces liquid combustible fromthe space 20 into the cylinder, the supply of liquid combustible beingexactly proportionate to the increase of volume behind the workingpiston caused by the motion of the piston. Compressed air, fromasuitable source of supply lalso enters through pipe 34 and valve 1`into the cylinder in the same proportion. The composition of the chargetherefore remains practically unchanged; At. the' closing of theadmission valve-K1 the liquid combustible valve, 11 alsois closed,andthe supply of combustible is throttledin the same manner by valve 11,as is the admission of air by the admission valve.,l When an excess ofpressure occurs in the space 20, the springloaded by-pass valve 18 ofthe pump opens,

and the combustible is forced back into thev reservoir. K

1t willlbe understood that the reservoir 15 and the main pump feedingthe same may be entirely dispensed with, but it is preferred to employthepressure reservoir, especially with engines having a high numberofrrevolutions. If' the reservoir' is omitted, the

valve 17 works as an ordinary suction valve,

which arrangement applicable where a main reservoir for combustiblesituated at a great height is available. The stroke of the piston 13 ofthe measuring pump may be' 'arranged to be -variable by any knowndeinvention and thebest means I know for carrying the same intopractical e'ect, I

' 1. In a uniform pressure internal combustion engine, the combinationwith the cylinder anda piston', of a valve controlling the admissionofcompressed air, mechanism to deliver fuel to the cylinder andmechanism to open said valve just before the piston has reached its deadpoint at the end of its com-Y pression stroke, and to hold saidvalveopen during a portion of the power stroke.

Y 2. In a uniform pressure internal combus- -tio'n engine, thecombination with the cylinder and piston therein, of a valve controllingthe admission of compressed air, a fuel- .feed control device having avalve, mechanism operated from a moving element of the Havingthusdescribed the nature of this A.

and its piston; of a valve controllingtheadmission of compressed air,awfuel reservoir containing fuel under pressure, a pump having its feedand delivery ends connected to the reservoir, valves controlling saideonneo tions, one of said valves being a by-pass valve a pipe(connecting the delivery end of the pump to the cylinder, a valve on theengine io control the supply of fuel thereto, nieehanisln tosimultaneously operate and time. the opening and closing of said air andfuel valves, and means to operate said pump from a moving element of theengine.

4. In a two-stroke uniform pressure, internal combustion engine, thecombination with the cylinder' and piston thereof; of a valve to controlthe admission of air and a valve on the engine to control the admissionof fuel thereto while the air admission valve is open, `valve mechanismto open said valves just before the piston has reached its dead point atthe end of the eon'ipression stroke, und to hold said valves open duringa portion of the power stroke.

In testimony whereof I have signed my name to this specification in thepresence o'l two subscribing witnesses.

` ADOLF VOGT. Vitnesses:

EDWARD GARDNER,

T. J. OsMAN.

